7b)Subjects Subject attending the Physiatrist and Geriatric Outpatient Clinics of the Department of Gerontology, Geriatric and Physiatrist Sciences of the University Hospital "Agostino Gemelli" (Rome, Italy) with non-specific Low Back Pain, with or without sciatic irradiation, from at least 3 months. Exclusion criteria: functional or neurosensorial limitations which contraindicate or impede attending a physical exercise program (spondilolystesis higher than first degree, disk herniation more recent than 6 months, disk herniation for which surgical intervention is indicated, previous surgical intervention on spine, cognitive deterioration, terminal prognosis).